Hi and welcome to the online community
Unfortunately, as each travel insurance company considers risks differently, it isn't possible to recommend one based on your medical conditions even if we knew what they were.
It can be more difficult to find travel insurance when you have a cancer diagnosis along with other medical conditions. I don't know whether you've looked through the Recommended Travel Insurance thread yet as it's where we try to keep recommendations from other forum members who have obtained travel insurance. Clicking on the link I've created will take you directly to it if you haven't seen it.
It is best to phone the travel companies rather than try and do online quotes. Make sure you have all the information to hand about your husband's diagnosis and treatment before contacting the insurers. This is a list of common questions that insurers might ask when you're applying for insurance.
Some insurers will ask for a letter from your doctor to prove that they have given you permission to travel. In any case it's always best to make sure that you have checked with your doctor that it's okay to travel and that this has been recorded in your notes in case of a claim.
I do hope that you can get reasonably priced travel insurance
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"Never regret a day in your life, good days give you happiness, bad days give you experience"
